How Thick Roofing Plywood

This minimum will only work if the rafters are set 16 inches apart at most and if the roof doesn t have too much load.

How thick roofing plywood.

Unlike with plywood siding the plywood sheet to be used for sheathing should be at least 3 8 inch thick. When used for roofing plywood panels are covered and protected by a variety of building materials that keep the elements at bay including roof felt underlayment flashing and shingles. The minimum plywood for roofing. Rafters that are slightly farther apart might require inch or 5 8 inch thick plywood.

Roofs are framed with rafters or trusses which are rafters joined by internal braces so they install as a single component. That s considered to be the minimum. Severe weather 1 2 in common douglas fir plywood sheathing application as 4 x 8. Rafters run from the peak of the roof.

Keep in mind that the load of the roof still plays a role in the plywood thickness. That s considered to be the minimum. The most common plywood uses include support for floors walls roofs and garages in residential construction.